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// Boost.Geometry
// Copyright (c) 2021-2023, Oracle and/or its affiliates.
// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP
#include <boost/geometry/algorithms/detail/assign_indexed_point.hpp>
#include <boost/geometry/util/algorithm.hpp>
#include <boost/geometry/strategies/distance.hpp>
namespace boost { namespace geometry
{
namespace detail { namespace closest_points
{
struct set_segment_from_points
{
template <typename Point1, typename Point2, typename Segment>
static inline void apply(Point1 const& p1, Point2 const& p2, Segment& segment)
{
assign_point_to_index<0>(p1, segment);
assign_point_to_index<1>(p2, segment);
}
};
struct swap_segment_points
{
template <typename Segment>
static inline void apply(Segment& segment)
{
geometry::detail::for_each_dimension<Segment>([&](auto index)
{
auto temp = get<0,index>(segment);
set<0,index>(segment, get<1,index>(segment));
set<1,index>(segment, temp);
});
}
};
template <typename Geometry1, typename Geometry2, typename Strategies>
using distance_strategy_t = decltype(
std::declval<Strategies>().distance(std::declval<Geometry1>(), std::declval<Geometry2>()));
template <typename Geometry1, typename Geometry2, typename Strategies>
using creturn_t = typename strategy::distance::services::return_type
<
typename strategy::distance::services::comparable_type
<
distance_strategy_t<Geometry1, Geometry2, Strategies>
>::type,
typename point_type<Geometry1>::type,
typename point_type<Geometry2>::type
>::type;
}} // namespace detail::closest_points
}} // namespace boost::geometry
#endif //BOOST_GEOMETRY_ALGORITHMS_DETAIL_CLOSEST_POINTS_UTILITIES_HPP
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